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Finding the Fourth Proportional to 2,078.12, 3,116.94 and 539.24

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Solution

The fourth proportional to 2,078.12, 3,116.94 and 539.24 is: 808.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,078.12 : 3,116.94 = 539.24 : x
  2. Step 2: Convert to fraction form
    2,078.12/3,116.94 = 539.24/x
  3. Step 3: Cross multiply
    2,078.12x = 3,116.94 × 539.24
  4. Step 4: Simplify right side
    2,078.12x = 1,680,778.73
  5. Step 5: Solve for x
    x = 1,680,778.73/2,078.12
  6. Step 6: Final answer
    x = 808.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.